如何在Java中Jlable上既显示图片又显示JtextField（以下代码错在哪里啊）

答案:1 悬赏:10 手机版

解决时间 2021-05-15 20:50

提问者网友：niaiwoma
2021-05-15 12:27

import javax.swing.ImageIcon;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JLabel;
import java.awt.Rectangle;
import javax.swing.JTextField;
import javax.swing.JPasswordField;
import javax.swing.JButton;

public class Ahi extends JFrame {

private static final long serialVersionUID = 1L;
private JPanel jContentPane = null;
private JPanel pan = null;
private JLabel users = null;
private JLabel userpassword = null;
private JTextField tfName = null;
private JPasswordField tfPass = null;
private JButton OK = null;
private JButton Cancel = null;
private JPanel back = null;
private JLabel lab = null;
private ImageIcon ii= new ImageIcon(getClass().getResource("/com/qq/image/20092792056688_2.jpg"));

public Ahi() {
super();
initialize();
}

private void initialize() {
  this.setSize(400, 300);
  this.setContentPane(getJContentPane());
  this.setTitle("JFrame");

}

private JPanel getJContentPane() {
  if (jContentPane == null) {
   jContentPane = new JPanel();
   jContentPane.setLayout(null);
   jContentPane.add(getPan(), null);
   jContentPane.setLayout(null);
   jContentPane.add(lab,new Integer(Integer.MIN_VALUE));
   jContentPane.add(pan);
  }
  return jContentPane;
}

private JPanel getPan() {
  if (pan == null) {

   pan = new JPanel();
   pan.add(back);
   pan.setLayout(null);
   pan.setOpaque(false);
   lab =new JLabel(ii);
   lab.setBounds(new Rectangle(2, 0, 400, 281));
   pan.setBounds(0, 0, 393, 264);
   pan.add(lab, null);

  }
  return pan;
}

private JTextField getTfName() {
  if (tfName == null) {
   tfName = new JTextField(20);
   tfName.setBounds(new Rectangle(170, 51, 150, 23));
   tfName.setOpaque(false);//设置为透明
  }
  return tfName;
}

private JPasswordField getTfPass() {
  if (tfPass == null) {
   tfPass = new JPasswordField();
   tfPass.setBounds(new Rectangle(170, 153, 150, 23));
   tfPass.setOpaque(false);
  }
  return tfPass;
}

private JButton getOK() {
  if (OK == null) {
   OK = new JButton("登陆");
   OK.setBounds(new Rectangle(94, 217, 75, 23));
   OK.setOpaque(false);
  }
  return OK;
}

private JButton getCancel() {
  if (Cancel == null) {
   Cancel = new JButton("取消");
   Cancel.setBounds(new Rectangle(203, 218, 75, 23));
  }
  return Cancel;
}

private JPanel getBack() {
  if (back == null) {
   back = new JPanel();
   back.setLayout(null);
   back.setOpaque(false);
   userpassword = new JLabel("密码");
   userpassword.setBounds(new Rectangle(56, 146, 65, 27));
   users = new JLabel("用   户");
   users.setBounds(58, 49, 65, 27);
   //back = new JPanel();

   back.setBounds(new Rectangle(0, 0, 393, 264));
   back.add(users, null);
   back.add(userpassword, null);
   back.add(getTfName(), null);
   back.add(getTfPass(), null);
   back.add(getOK(), null);
   back.add(getCancel(), null);
   back.add(lab, null);
  }
  return back;
}

} // @jve:decl-index=0:visual-constraint="207,-4"

最佳答案

五星知识达人网友：孤独的牧羊人
2021-05-15 13:31

建立一个JPanelclass ImageJPanel extends JPanel //绘制背景图片 public void paintComponent(Graphics g) } 在实例化组件的时候，将该面板添加进去：ImageJPanel ip=new ImageJPanel();ip.setBounds(0,0,this.getWidth(),this.getHeight());//设置背景图片的长和宽和窗体大小一致this.add(ip);//添加到面板中

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